气候变化领域集成服务门户(CCPortal): Improved atmospheric circulation over Europe by the new generation of CMIP6 earth system models

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DOI	10.1007/s00382-021-05652-9
	Improved atmospheric circulation over Europe by the new generation of CMIP6 earth system models
	Fernandez-Granja J.A.; Casanueva A.; Bedia J.; Fernandez J.
发表日期	2021
ISSN	0930-7575
起始页码	1037
结束页码	1052
卷号	56 期号:2021-11-12
英文摘要	Global Climate Models (GCMs) generally exhibit significant biases in the representation of large-scale atmospheric circulation. Even after a sensible bias adjustment these errors remain and are inherited to some extent by the derived downscaling products, impairing the credibility of future regional projections. In this study we perform a process-based evaluation of state-of-the-art GCMs from CMIP5 and CMIP6, with a focus on the simulation of the synoptic climatological patterns having a most prominent effect on the European climate. To this aim, we use the Lamb Weather Type Classification (LWT, Lamb British isles weather types and a register of the daily sequence 736 of circulation patterns 1861-1971. METEOROL OFF, GEOPHYS MEM; 737 GB; DA 1972; NO 116; PP 1-85; BIBL 2P1/2, 1972), a subjective classification of circulation weather types constructed upon historical simulations of daily mean sea level pressure. Observational uncertainty has been taken into account by considering four different reanalysis products of varying characteristics. Our evaluation unveils an overall improvement of salient atmospheric circulation features consistent across observational references, although this is uneven across models and large frequency biases still remain for the main LWTs. Some CMIP6 models attain similar or even worse results than their CMIP5 counterparts, although in most cases consistent improvements have been found, demonstrating the ability of the new models to better capture key synoptic conditions. In light of the large differences found across models, we advocate for a careful selection of driving GCMs in downscaling experiments with a special focus on large-scale atmospheric circulation aspects. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
英文关键词	Comparison CMIP5-CMIP6; Lamb weather type classification; Process-based evaluation
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183274
作者单位	Meteorology Group, Department of Applied Mathematics and Computer Science, University of Cantabria, Santander, 39005, Spain
推荐引用方式 GB/T 7714	Fernandez-Granja J.A.,Casanueva A.,Bedia J.,et al. Improved atmospheric circulation over Europe by the new generation of CMIP6 earth system models[J],2021,56(2021-11-12).
APA	Fernandez-Granja J.A.,Casanueva A.,Bedia J.,&Fernandez J..(2021).Improved atmospheric circulation over Europe by the new generation of CMIP6 earth system models.Climate Dynamics,56(2021-11-12).
MLA	Fernandez-Granja J.A.,et al."Improved atmospheric circulation over Europe by the new generation of CMIP6 earth system models".Climate Dynamics 56.2021-11-12(2021).